package com.kuang.config;

import org.omg.PortableInterceptor.Interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，存在用户session
        Object loginUser = request.getSession().getAttribute("loginUser");

        if (loginUser == null) {//没有登录
            request.setAttribute("msg", "没有权限，请先登录！");
            request.getRequestDispatcher("/index.html").forward(request, response);//？多一个空格？
            return false; //进行拦截
        } else {
            return true;  //拦截器放行
        }
    }

}
